Rim night-latch



P. F. AUGENBRAUN.

RIM NGHT LATCH.

'APPLIOATXON FLED JAN, 8. 190B.

Patented Api. E969.

the

CNiTEiD: sATs PATENT oEErCE.

PETER r. AUGENRRAUN, oE sTAMFoRD, CONNECTICUT, AsseNoR To TEE YALE aToWNE MANUFACTURING ooMRANY, or sTAMroRD, CONNECTICUT* n No.' cineos.

To all whom it may concermj Be it known that I, PETER l?. AUGEN- BRAUN,ol' Stamford, in the county ol Fairfield and State of Connecticut, have.invented -certa'in new and useful Improvements ,in Rim Night-Latches;and I do hereby declare the following to be a full, clear, and exactdecri tion of the invention, such as will enable otliersskilled-in theart to which it ap ertains to make and use the same.l

Iy invention' relates to an improvement i-n rim night latches, theobject being to provide means for positivelydead-lockin the latch. boltagainst forcible retraction. y a

tool entered between the inclined face ofthe bolt and the-stop plate,and it consists in the parts and combinations of parts as will be morefullyv described and pointed out in the claims. y

In theaccompanying" drawings, Fi vure l ris a view in perspective of myimprove lock looking toward the exposed latch bolt, land 'thedead-lookin slide. Fig. 2 is a rear face view` of the loc Fig. 3 is a.similar view withthe rear plate removed, showing the latch bolt anddeadlocking slideyin their Y outer positions; Fig. 4 is a similar viewshowing the bolt in its locking position and the dead locking slidev inits normal position when the bolt isdead-locked. Fig. 5 is a viewin'llongitudinal section of the` lock.)

Fig. 6 is a view in side elevation and Fi 7 a view in perspective of thelatch bolt. Figs. I views of the dead locking i slide. Figs. 10, 1-1 and12 are views of the 8 and 9 are similar dead locking lever and Figs. v13and 14 are views of thecross head which supports and guides the'stcms oflocking slide.

1 re resents the latch casin openen its inner ace only, and providerI at.one end with an opening for the passage of the latch bolt 2, and withwider openings on opposite sides of the latch opening for the passagevol' the deadl'ocki slide 3. v The latch MIE-2 iis-reversible, and isprovided at .as inner end, within .the Casing 1,

. and'at 'diametrically opposite corners, with te projecting lugs 4, oneof which rests in t e a ter is in dead-locking osition.

AS above stated the` lateY is reversible,

be placed with `its inthat is to say it ma l he rear face of the lock,

` clined edge toward t vlplane ofthe .dead locking lever 5,when4 vspeciication of Letters Pateat.

in-rication led January 8, 1908. Serial. No. 409,821.

the latch bolt and dead' RIM NIGHT-LATCH Patented April. 6, 1909.

as shown in the drawing, for a door opening inwardly, and with itsinclined face toward .the outer face of the case l'or use on a dooropening outwardly, hence in either position oneof the lugs 4 will be solocated asA to be engaged by the dead locking' lever, as will behereinafter more fully referred to.

When the latch bolt is reversed the dead locking slide must also bereversed, hence the front face of the lock is slotted on both sides ofthe latch bolt opening, for the reception of the dead locking slide 3.

, Projecting inwardly from latch bolt 2, are v the parallel rods orstems 6, each of which is l -relation to the bolt head and also to thecasing and ass through the cross head 1.2- mounted etween lugs 13 to thesides of case 1, and forming supports and guides in which ythe latchstems 6 rest and move.

The dead locking slide 3 comprises a flat plate, wider than the latchbolt so as' to roject on opposite sides thereof. This'slic e is providedat its rear end with-anjosat, formmg av shoulder 15 whichlatter abut'sagainst the rear` face of the latch bolt and normally holds` the outerend oi' the latter flush with the outerl end of the bolt.

Projecting rearwardly from the offset 14',

the integral stem l5-l Which latter resta centrall wlthinthe lock case.1, between and in the plhne of the stems 6 of the bolt 2, so as" toermit oi". the reversal of the dead locking This stem 15a is slotted forthe reception of the guiding stud 16 integral 'with the lookin casing,and also foithe pin. 17 'of the dea locking lever 5; it passes through"a-slot formed in the cross head 12 and is supported at its' rear endbetween the slotted shoulders 18 projecting forwardly from the crosr.head.

Mounted on,one stem 6 intermediate tlrxyel 1h51 cross head i2 andtherear end of the latch" bolt, is the-springg'which tends to heldthelatch' bolt in its 'locking' position, and

mounted on the' other stein G intermediate the cross head 12 and thefsleeve 2O integral lwith the stem of the dead locking slide, isthespring 21. This `sleeve 20. embraces the stem of the bolt, hence itwill be seen that one spring operates always to force the bolt outwardlyand the otner operates to i'oree the bolt outwardly through thef mediumof the dead locking slide, while both yieldingly.

hold the cross head in its seat between the lugs 13.

The dead locking lever 5 which is in l'orm .stem ofthe dead lockingslide. Yltf'hen the dead locking slide is in its normal projectedposition, the rear wall ol' the slot in the `stem 15L1 engages the pin17 and forces the latter 'forwardly thus turning the lever 5, andcarrying the longer arm 22 out ci the path of the rojeeting tongue 4 onthe latch bolt. When `however the dead locking slide is forced inwardly,thevpin 17 will be released, thus permitting the spring 23 to turn thelever 5 until its longer arm is in the ath of tongue 4 and thereby4positively 'cead lock the bolt against movement a ainst any pressure ortorce exerted against the outer end oi' the latch bolt.- A

From the construction described, it will be seen, that, as the rear endof the bolt engages the shoulder 15 on the dead locking slide, when thelatch bolt is forced inwardly,

the dead-lockin lslide'must also move inwardly therewit i, but the boltcan move outwardly to its locking position independently of the slide,hence in closing` the door, the Contact of the bolt with the strikeplate or keeper forces the bolt and dead locking slide inwardly. As thedoor reaches its closed osition the bolt drops into the slot in the ee)er thus locking the door, while the dead locking slide engages thestrike plate or keeper atthe sides of bolt recess and is held in itsretracted position thusreleasing the dead locking lever and permittingsame to move into the path of movement o'l' tongue 4 on the rear end oflatch'bolt, and thus dog the latter. The parts are so constructed thatas the bolt is forced or drawn inwardly7 it moves sufficiently beforereleasing the dead locking lever, to carry the tongue 4 into the path ofmovement of the long arm 22 of the dead locking lever, 'therebypreventing the latter from moving to a position in rear oi' the tongue.When however the door reaches its closed position and the bolt entersthe openin in the strike plate, the long arm of the dea locking levermoves to its `flogging position in rear of the tongue 4, and positivelyprevents a retracin the usual manner.

the use of a'propcit kev.

tion of the' bolt pro er key.

except theiknob er the he roll backs 8 and 10 are each the lug'26thereon is lbeveled on`its -l'ront plate, so that in the event the'slide is in a position where its lug 26 would obstruct the free inwardmovement ofthe bolt, the beveled rear face of ear 27 on bolt 2, Willdposition, but maybe heldin its engage the beveled front face lofthelug26` l and move the slide longitudinally.

The rear plate 11 ol' the lock carries the Aroll back l0 of tlielkeymechanism arid is connected to the key cylindermechanism With thislatch, when the door is closed, itis impossible to throw the latch-boltfrom the outside, except by In other night latches the bolt-can beretracted by the insertion ofa knife blade between tlie strike plate andbeveled face of the bolt, but with my improvement itis impossible toforce the bolt by any pressure eX- erted against the outer exposed faceofthe It is evident that. many `slight changes inightbe made in therelative arrangement of parts shown end described without departingfroin the spirit and scope of my in ventionhence I would haveitwiunderstood that l do not wish to confine myself to the exactconstruction and arrangement ofparts ockingl the bolt, ol' knob .and keymechan. ism each having independent connection with the bolt, and eachalso operatively connected with the deadlocking means whereb the latterwill be actuated to release the bo t by the proper movement of either ofsaid mechanisms. 2. In a latch the combination with a latch bolt and adeadlockiing` slide normally pro Ajecting from the face ofthe latehandadapted to engage the strike plate or keeper and be held inwardlythereby,of a lever for deadlocking the bolt, aspring normally tending 80positionsl by a spring pressed friction pin and of the bolt, and twoindependent roll backs .means actuated by the slide.

'of a dead locking slide restingl on the bolt and movable inwardlytherewith, a slotted aliases to hold saiddever in the path oi the bolt,

knobl and key mechanism each having independent connection with thebolt, and each operatively connected With the deadlocklng' lever,whereby the latter Will be moved in a direction to reiease the boltbythe movement oi eithe the knob or key mechanisms.

3. in a latch, the combination With a latch bolt, of a pivoted lever, aspring tending to hold one end of said level` 1n the path of the boltfor deadlocking the latter, a dead locking slide adapted when projectedto engage the lever'and move it out of the path each having independentconnection with the'bolt and with the dead locking lever. 4 fein a latchthe combination with a bolt and knob and key actuated mechanism eachhaving independent connection with said bolt for retreating saine, of adead locking device normally resting in the path oi the bolt, andengaged by both the key and knob actuated mechanisms, whereby saiddeadlocking device will be moved out of the path of the bolt by said keyand knob actuated devices prior to the retraction of the bolt by thelatter.

5. ln a latch the combination. with a casing having a slot for the boltand a vvidei1 slot on each side of the bolt. slot, of. a reversibledeadlocking slide, andV bolt dead locking 6. l'he combination with abolt, parallel stems progecting rearwardly therefrom, and a cross headthrough which the stems pass,

stem on the rear end of the slide, a spiing embracing one stein of thebolt and bearing against the bolt, a springenibracng the other stein oftliebolt and bearing against a projection on the dead. locking slide,and a dead locking lever actuated in one direction by the slide and inthe other direction by a 4vensible deadlocking slide,

spring.

7. n a latch, `the combniation with a bolt, l

a deadloching slide, 'and a dead locking le- Il ver, of knob and keyroll backs each having a centrally located recess for the reception of ain on the dead locking lever, and adapted W en turned to move the deadlocking leverI out of the path of the bolt.

8. The combination with a bolt and its stein, a deadlock-ing slide andits stein. the

said slide having a bearing on the stein of the bolt and :adapted to beheld in its le' tracted position by the strike plate or heepe,

and springs one oi which tends to hold the bolt and theother the slideand bolt jected, of a deadlocking lever actuate by the dead lockingslide to i'elease the bolt, a

spring tending to hold said iever in its deadlocking position and boit'retracting means for moving the dead locking'lever out of the recessfor vthe rece tion oi a pin on the dead locking lever, an ada ted whenturned to move the dead locking ever ontl of the path of the bolt.

i0. In a rim night latch the combination with a casing having a sint forthe bolt and a slot on each side ot the bolt slot, of -a re# and boltdeadlocking means actuated by the slide.

il. the combination with a bolt, a deadlocking device tot' same, and adead locking slide wider than the bolt so as to project beyond the edgesof' the latter, and engaging means whereby the slide is moved inwardlyWith the bolt,l of knob mechanism adapted when actuated to firstdisengage the deadlochin device from the bolt and then retract the be t.l 'y ln testimony whereof, 1 have signed this specification inthe ingwitnesses. l

PETER F. AUGENBRUN. ititnesses WARREN H. TAYLOR, Winnen E. Wesson.

presence oi two 'snbscribv

